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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 279 · 40 questions
TalentJR

The trick (Split and double): Split the number into tens and ones: 37 = 30 + 7. Double each part (30 → 60, 7 → 14) — or halve each part. Add the two answers: 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.Double 13 =
  2. 2.Double 11 =
  3. 3.Double 19 =
  4. 4.Double 39 =
  5. 5.Double 44 =
  6. 6.Double 46 =
  7. 7.Half of 192 =
  8. 8.Half of 132 =
  9. 9.Half of 196 =
  10. 10.Double 96 =
  11. 11.Double 18 =
  12. 12.Half of 174 =
  13. 13.Half of 88 =
  14. 14.Double 22 =
  15. 15.Half of 72 =
  16. 16.Half of 78 =
  17. 17.Double 24 =
  18. 18.Double 58 =
  19. 19.Half of 48 =
  20. 20.Double 21 =
  21. 21.Double 42 =
  22. 22.Double 36 =
  23. 23.Double 91 =
  24. 24.Half of 144 =
  25. 25.Double 17 =
  26. 26.Half of 18 =
  27. 27.Double 12 =
  28. 28.Double 29 =
  29. 29.Double 51 =
  30. 30.Half of 128 =
  31. 31.Half of 162 =
  32. 32.Half of 106 =
  33. 33.Half of 86 =
  34. 34.Half of 112 =
  35. 35.Double 47 =
  36. 36.Double 35 =
  37. 37.Half of 22 =
  38. 38.Double 25 =
  39. 39.Double 97 =
  40. 40.Half of 44 =

Answer key

  1. 26
  2. 22
  3. 38
  4. 78
  5. 88
  6. 92
  7. 96
  8. 66
  9. 98
  10. 192
  11. 36
  12. 87
  13. 44
  14. 44
  15. 36
  16. 39
  17. 48
  18. 116
  19. 24
  20. 42
  21. 84
  22. 72
  23. 182
  24. 72
  25. 34
  26. 9
  27. 24
  28. 58
  29. 102
  30. 64
  31. 81
  32. 53
  33. 43
  34. 56
  35. 94
  36. 70
  37. 11
  38. 50
  39. 194
  40. 22

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